Delusional halitosis. Review of the literature and analysis of 32 cases

Halitosis, or bad breath, is a feature of some oral and systemic diseases. However, there are apparently healthy individuals who complain of having bad breath which no one else can smell and for which no local or systemic condition can be found. This condition, referred to in this article as delusional halitosis, has identical features with a psychiatric disorder, monosymptomatic hypochondriacal psychosis. This paper reviews the literature on halitosis and oral psychogenic disorders and presents an analysis of 32 cases of delusional halitosis that presented at the University of Benin Dental Hospital, Nigeria, in the period 1984-1986.     

基底膜提取物对人牙龈上皮细胞在钛表面附着的影响—扫描电…

类探讨增进牙龈上皮细胞在钛表面附着的因素，将基底膜提物Ｍａｔｒｉｇｅｌ涂在光滑纯钛片表面，扫描电镜观察原代培养的人牙龈上皮细胞在涂Ｍａｔｒｉｇｅｌ 钛表面和光滑钛表面的伸展情况。     

Osseointegrated implants for single tooth replacement in general practice: A 1-year report from a multicentre prospective study

The single tooth implant is a treatment option for the replacement of missing single teeth and in many cases is the treatment of choice. It is, however, an expensive treatment requiring a co-ordinated approach to the surgical and restorative aspects of treatment. In this study, a group of dentists in general and restorative dental practice and with no previous experience in implant surgery underwent an intensive training course in all aspects of implant treatment for single teeth. Using a system of simplified instrumentation with a strict adherence to protocol, the group installed and restored single tooth implants ad modum Brånemark in a wide range of clinical situations. At the one year follow-up period following crown insertion, the success rate of treatment compared favourably with results reported from centres using the specialist team approach to treatment. The results of this study indicate that further consideration should be given to the training of general dentists so that improved delivery of dental health care can be provided at a more economic level.     

Impacted maxillary third molars. Accidental dislocation

During surgical removal of impacted maxillary third molars, many complications may occur. Their accidental displacements in the maxillary sinus or in the infratemporal fossa are not too rare in the common general dentistry. Presenting this case, the Authors want to demonstrate that, when each one of this kind of teeth are well studied before their treatment, many complications can be avoided and, the sooner the dentist is able to solve them when they occur, the better the post-operative course will be.     

The influence of mixing ratio on the working time, strength and wear of composites

The influence of varying the paste-to-paste ratio of chemically initiated composites on the working time, diametral tensile strength and in vitro 'occlusal' wear was investigated. If the mixing ratio was varied, the working time was not equally affected for the various brands. This is explained by different relative inhibitor concentrations in the pastes. Within reasonable deviations from the 1:1 ratio, no significant influence on the diametral tensile strength occurred. Wear properties as determined by a simulated occlusal wear test on three posterior composites, was more sensitive to the mixing ratio.     

The need for operative dentistry services: projecting the effects of changing disease patterns

The declining incidence of caries in children and adolescents has caused speculation that there will soon be a great reduction in need for restorative services among adults. This study used recent dental epidemiological data, population estimates, and numerous alternative assumptions to calculate the hours of adult operative dentistry treatment need in the US in 1972, 1990, and 2030. According to those calculations, the total hours of need were about 125 million in 1972. In 1990 and 2030, the projected hours of need were determined to be about 150 million and 192 million, respectively.     

The effect of complete dentures on head posture

This study investigated possible changes in head posture after insertion of complete dentures in patients who had been edentulous for at least 6 months. The craniovertical angle was measured with a plastic ruler and protractor assembly, which was aligned with dots made on the skin over the zygomatic arch. Readings were made before denture insertion, immediately after insertion, and 15 and 30 minutes later. Two-way ANOVA was used to analyze the results. When the predenture insertion values were included, statistically significant changes (p less than 0.01) in head posture were found. However, when the predenture values were excluded, no statistically significant differences were found. The results support the conclusions that head posture is significantly altered immediately after insertion of dentures in edentulous patients but within the next 30 minutes there is no statistically significant alteration in head posture.     

Electrophoretic heterogeneity of lipopolysaccharides of Actinobacillus actinomycetemcomitans

Electrophoretic banding patterns of lipopolysaccharides (LPS), as observed by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE), have proved to be useful in studies relating LPS structure to virulence and as epidemiological markers. In this report, LPS of actinobacillus actinomycetemcomitans from outer membrane fractions and hot phenol-water extracts were analyzed by SDS-PAGE and LPS-specific silver-staining techniques. Both intra- and inter-strain heterogeneity of A. actinomycetemcomitans LPS was observed. Twelve strains of A. actinomycetemcomitans, representative of the three described serotypes, were assigned to LPS subtypes based on the relative mobility of their most rapidly migrating LPS band. All three serotype a strains (29523, aB75, and GA3), two (29524 and SAC11A) of five serotype b strains, and two (aB67 and SAC5A) of four serotype c strains were assigned to LPS subtype I. The three remaining serotype b strains (29522, Y4, and JP2) were assigned to LPS subtype II, and the remaining two serotype c strains (SAC6A and SAC12A) were assigned to LPS subtype III. LPS subtyping may serve as an adjunct or alternative to serotyping in epidemiological studies.